Classifications

• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/16—Organic compounds
  • C11D3/20—Organic compounds containing oxygen
  • C11D3/2003—Alcohols; Phenols
  • C11D3/2041—Dihydric alcohols
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/38—Cationic compounds
  • C11D1/62—Quaternary ammonium compounds
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/0005—Other compounding ingredients characterised by their effect
  • C11D3/001—Softening compositions
  • C11D3/0015—Softening compositions liquid
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/16—Organic compounds
  • C11D3/20—Organic compounds containing oxygen
  • C11D3/2003—Alcohols; Phenols
  • C11D3/2041—Dihydric alcohols
  • C11D3/2044—Dihydric alcohols linear
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/16—Organic compounds
  • C11D3/20—Organic compounds containing oxygen
  • C11D3/2003—Alcohols; Phenols
  • C11D3/2041—Dihydric alcohols
  • C11D3/2048—Dihydric alcohols branched
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/40—Dyes ; Pigments
  • C11D3/42—Brightening agents ; Blueing agents
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/43—Solvents

Definitions

• the present invention relates to fabric conditioning compositions, and in particular, relates to liquid fabric softener compositions comprising a fluorescer.
• Rinse added fabric conditioning compositions are well known.
• such compositions comprise a liquid or solid fabric softening agent dispersed in an aqueous medium.
• the fabric softening agent can be included at up to 8% by weight, in which case the compositions are considered dilute, or at levels from 8% to 60% by weight, in which case the compositions are considered concentrated.
• a fluorescent dye such as the salt of a diaminostilbene (DAS) derivative
• DAS diaminostilbene
• EP 275694 U.S. Pat. No. 4,497,718 and U.S. Pat. No. 4,562,002 all disclose rinse conditioner compositions containing a fluorescent dye based on a diaminostilbene derivative.
• EP 368383 discloses a tumble dryer sheet with sodium salt of a fluorescent agent.
• JP 10219297 discloses a rinse aid consisting of a polybasic acid and a fluorescer.
• the compositions disclosed appear to lack softening compounds.
• U.S. Pat. No. 5,935,272 discloses a water soluble fluorescent dye-stuff.
• U.S. Pat. No. 4,460,374 discloses a process for whitening a textile, particularly made-up goods such as curtains and underwear, comprising the step of applying to the textile in an aqueous medium a composition which comprises
• WO 98/52907 describes a cationic fabric conditioning composition which may optionally be clear and may contain a diaminostilbene derivative fluorescer.
• the diaminostilbene fluorescer is classified as hydrophilic.
• the present invention seeks to address one or more of the above-mentioned problems, and, to give one or more of the above-mentioned benefits desired by consumers.
• a clear or translucent fabric conditioning composition comprising a fluorescer of the type defined in claim 1 is stable against photodegradation.
• composition provides a greatly enhanced appearance to the clear or translucent composition. Also, it provides increased stability against photodegradation for other products (when present) in the composition, e.g. dyes and perfumes.
• an clear or translucent liquid fabric conditioning composition comprising:
• the fluorescer is solubilised in the organic phase of the composition.
• a method of conditioning fabrics comprising contacting the above-mentioned fabric conditioning composition with fabrics.
• a fluorescer in a fabric conditioning composition to reduce yellowing of fabrics wherein the fluorescer is solubilised in the organic phase of the composition.
• the present invention is particularly concerned with clear or translucent liquid fabric softening compositions.
• Such a product is preferably, though not essentially, a microemulsion. That is a product which is isotropic and thermodynamically stable over a specified temperature range.
• the clear or translucent composition of the present invention comprises a fluorescer which is hydrophobic.
• hydrophobic it is meant that the fluorescer has a hydrophobicity, measured by C log P, of 3 to 50, more preferably 4 to 50, most preferably 5 to 50, e.g. 6 to 50.
• C log P is measured using the “C log P” program (calculation of hydrophobicities as log P (oil/water)) version 4.01, available from Daylight Chemical Information Systems Inc of Irvine Calif., USA.
• a commercially available fluorescer of this type is Blankophor DCB (4-[3-(4-chlorophenyl)-4,5-dihydro-1h-pyrazol-1-yl]benzenesulphonamide), ex Bayer.
• the fluorescer is solubilised in the organic phase of the composition. It has been observed that this provides a greater deposition of the fluorescer onto synthetic materials, e.g. polyesters, than if the fluorescer is solubilised in the aqueous phase of the composition.
• the fluorescer is present at a level of from 0.001 to 2 wt %, more preferably from 0.003 to 1.5 wt %, most preferably from 0.004 to 1 wt %, e.g. 0.005 to 0.8 wt %, based on the total weight of the composition.
• Hydrophilic fluorescers as described below, are not suitable for use in the compositions of the present invention.
• Diaminostilbene disulphonic acid type fluorescers (hereinafter referred to as “DAS”) are classified as hydrophilic in WO-A-98/52907.
• a commercial example of a DAS is Tinopal DMS (ex CIBA).
• hydrophilic fluorescer is a distyrylbiphenyl fluorescer (hereinafter referred to as “DSBP”).
• DSBP distyrylbiphenyl fluorescer
• Tinopal CBS-X also ex CIBA
• both DAS and DSPB fluorescers complex with cationic materials, e.g. cationic softening agents, that are typically present in softening compositions forming insoluble flocs.
• the fabric conditioning composition of the present invention comprises one or more cationic softening materials typically included in rinse-added fabric softening compositions.
• the surfactants may comprise quaternary ammonium compounds.
• the cationic surfactant is a water insoluble quaternary ammonium material which comprises a compound having two C 12-18 alkyl or alkenyl groups connected to the nitrogen head group via at least one ester link. It is more preferred if the quaternary ammonium material has two ester links present.
• a first group of preferred ester-linked cationic surfactant materials for use in the invention is represented by formula (I): wherein each R 1 group is independently selected from C 1-4 alkyl, hydroxyalkyl or C 2-4 alkenyl groups; and wherein each R 2 group is independently selected from C 8-28 alkyl or alkenyl groups; T is
• X ⁇ is any anion compatible with the cationic surfactant, such as halides or alkyl sulphates, e.g. chloride, methyl sulphate or ethyl sulphate and n is 0 or an integer from 1-5.
• Especially preferred materials within this formula are di-alkenyl esters of triethanol ammonium methyl sulphate and N-N-di(tallowoyloxy ethyl)N,N-dimethyl ammonium chloride.
• Tetranyl AOT-1 di-oleic ester of triethanol ammonium methyl sulphate 80% active
• AO-1 di-oleic ester of triethanol ammonium methyl sulphate 90% active
• L1/90 partially hardened tallow ester of triethanol ammonium methyl sulphate 90% active
• L5/90 palm ester of triethanol ammonium methyl sulphate 90% active (supplied by Kao corporation)
• Rewoquat WE15 C 10 -C 20 and C 16 -C 18 unsaturated fatty acid reaction products with triethanolamine dimethyl sulphate quaternised 90% active
• a second preferred type of quaternary ammonium material is represented by formula (II): wherein R 1 , R 2 , n and X ⁇ are as defined above.
• Preferred materials of this class such as 1,2 bis[tallowoyloxy]-3- trimethylammonium propane chloride and 1,2-bis[oleyloxy]-3-trimethylammonium propane chloride and their method of preparation are, for example, described in U.S. Pat. No. 4,137,180 (Lever Brothers), the contents of which are incorporated herein.
• these materials also comprise small amounts of the corresponding monoester, as described in U.S. Pat. No. 4,137,180.
• a third preferred type of quaternary ammonium material is represented by formula (III): where R 1 and R 2 are C 8-28 alkyl or alkenyl groups; R 3 and R 4 are C 1-4 alkyl or C 2-4 alkenyl groups and X ⁇ is as defined above.
• Examples of compounds within this formula include di(tallow alkyl)dimethyl ammonium chloride, di(tallow alkyl)dimethyl ammonium methyl sulphate, dihexadecyl dimethyl ammonium chloride, dioctadecyl dimethyl ammonium chloride and di(coconut alkyl)dimethyl ammonium chloride.
• the quaternary ammonium material is biologically degradable.
• the cationic surfactants are present in the composition in amount from 2-80% by weight of cationic surfactant (active ingredient) based on the total weight of the composition, more preferably 2.5-65% by weight, most preferably 3-51% by weight.
• the cationic surfactants are preferably present in an amount of 10-80% by weight of cationic surfactant (active ingredient) based on the total weight of the composition, more preferably 11-45% by weight, most preferably 12-40% by weight.
• Preferred cationic surfactant compounds are substantially water insoluble.
• the iodine value of the quaternary ammonium softening agent is from 5 to 140, preferably 10 to 120, more preferably 15 to 100, most preferably 25 to 97, e.g. 35 to 95.
• the cis:trans isomer weight ratio of the chains in the fatty acid/fatty acyl compound is greater than 20:80, preferably greater than 30:70, more preferably greater than 40:60, most preferably greater than 50:50, e.g. 70:30 or greater. It is believed that higher cis:trans isomer weight ratios afford the compositions comprising the compound better low temperature stability and minimal odour formation.
• Suitable fatty acids include Radiacid 406, ex. Fina.
• cis:trans isomer weight ratios can be controlled during hydrogenation by methods known in the art such as by optimal mixing, using specific catalysts and providing high H 2 availability.
• Saturated and unsaturated fatty acids/acyl compounds may be mixed together in varying amounts to provide a compound having the desired iodine value.
• compositions of the present invention comprise at least one oil and/or one low molecular weight solvent.
• the oil may be a mineral oil, an ester oil and/or natural oils such as vegetable oils. However, ester oils or mineral oils are preferred.
• the ester oils are preferably hydrophobic in nature. They include fatty esters of mono or polyhydric alcohols having from 1 to 24 carbon atoms in the hydrocarbon chain, and mono or polycarboxylic acids having from 1 to 24 carbon atoms in the hydrocarbon chain, provided that the total number of carbon atoms in the ester oil is equal to or greater than 16, and that at least one of the hydrocarbon chains has 12 or more carbon atoms.
• Suitable ester oils include saturated ester oils, such as the PRIOLUBES and ESTOLS (ex. Uniqema). 2-ethyl hexyl stearate (PRIOLUBE 1545), neopentyl glycol monomerate (PRIOLUBE 2045), methyl laurate (PRIOLUBE 1415), isopropyl myristate (ESTOL 1514), propylene glycol dicaprylate (ESTOL 1526) and ethyl hexyl cocoate (ESTOL 1540) are particularly preferred although oleic monoglyceride (PRIOLUBE 1407) and neopentyl glycol dioleate (PRIOLUBE 1446) are also suitable.
• PRIOLUBE 1545 2-ethyl hexyl stearate
• PRIOLUBE 2045 neopentyl glycol monomerate
• methyl laurate PRIOLUBE 1415
• ESTOL 1514 isopropyl myr
• the ester oil may also be a CPE or RSE polyester oil, as defined on page 4 line 28 to page 9 line 16 of WO-A1-98/16538, the content of which is incorporated herein.
• the viscosity of the ester oil is from 0.002 to 0.4 Pa.S (2 to 400 cps) at a temperature of 25° C. at 106 s ⁇ 1 , measured using a Haake rotoviscometer, and that the density of the mineral oil is from 0.8 to 0.9 g.cm ⁇ 3 at 25° C.
• Suitable mineral oils include branched or straight chain hydrocarbons (e.g. paraffins) having 8 to 35, more preferably 9 to 20 carbon atoms in the hydrocarbon chain.
• hydrocarbons e.g. paraffins
• Preferred mineral oils include the Marcol technical range of oils (ex Esso) although particularly preferred is the Sirius range (ex Silkolene) or Semtol (ex. Witco Corp.).
• the molecular weight of the mineral oil is typically within the range 100 to 400.
• One or more oils of any of the above mentioned types may be used.
• the oil provides excellent perfume delivery to the cloth and also increases perfume longevity upon storage of the composition.
• the oil may be present in an amount from 11-70% by weight, more preferably 12-60%, by weight most preferably 15-52%, e.g. 20-45% by weight, based on the total weight of the composition.
• the weight ratio of cationic softener to oil in the composition is in the range from 5:1 to 1:10, preferably from 4:1 to 1:5, more preferably from 3:1 to 1:3.
• the oil referred to herein is preferably added to the composition as a separate component, that is, in addition to any oil which may be present in other components of the composition.
• the solvent is preferably organic, such as a low molecular weight (preferably 180 or less) alcohol, including monohydric and polyhydric alcohols, e.g. diols.
• the presence of the lower molecular weight alcohol helps improve physical stability upon storage by lowering the viscosity to a more desired level and also assists the formation of the micro-emulsion.
• suitable alcohols include ethanol, isopropanol, n-propanol, dipropylene glycol, t-butyl alcohol, 2,2,4-trimethyl-1,3-pentanediol (TMP), hexylene glycol, and glycerol.
• TMP 2,2,4-trimethyl-1,3-pentanediol
• hexylene glycol a combination of 2,2,4-trimethyl-1,3-pentanediol (TMP) and hexylene glycol. This combination is far superior to other alcohols in solubilising the components of the composition whilst avoiding undesirable odours.
• the solvent may be added to the composition either by being present as a component in the cationic surfactant or it may be added separately.
• the solvent is preferably present in an amount from 0.05% to 40% by weight, more preferably from 0.1% to 25% by weight, most preferably from 0.15% to 16% by weight, based on the total weight of the composition.
• the weight ratio of cationic softener to solvent in the composition is in the range from 8:1 to 1:3, preferably from 6:1 to 1:2, more preferably from 4:1 to 1:1.
• Mixtures of solvents may be used if desired.
• compositions of the invention may be aqueous based.
• the level of water present is from 0.5-99% by weight, more preferably 1-89% by weight, even more preferably 2-87% by weight, most preferably 3-85% by weight, based on the total weight of the composition.
• compositions contain one or more dispersion aids.
• the dispersion aid assists the dispersion of the micro-emulsion when it is diluted in water.
• Especially preferred dispersion aids for use in the compositions of the invention are alkoxylated nonionic fatty alcohols, such as C 10 -C 22 alkyl/alkenyl alkoxylated with 3-20 moles alkoxy moieties.
• the fatty alcohols may be alkoxylated with ethylene oxide, propylene oxide or ethylene oxide/propylene oxide mixtures.
• compositions of the invention can be selected from mono-long chain alkyl cationic quaternary ammonium compounds and mono-long chain alkyl amine oxides.
• the concentration of the dispersion aid is from 0.05-30% by weight, more preferably from 0.3-20% by weight, most preferably from 1-15% by weight, based on the total weight of the composition.
• the dispersion aid may also act as a stabiliser for the micro-emulsion so that addition of the dispersion aid provides a more stable micro-emulsion product.
• the weight ratio of the quaternary cationic softening compound to the total amount of dispersion aid is from 3:1 to 8:1, more preferably 5:1 to 7:1.
• compositions of the invention may, optionally, comprise one or more additional stabilisers which stabilise against oxidation and/or reduction.
• the stabilisers are present as anti-oxidants, they may be added at a level of from 0.005 to 2% by weight based on the total weight of the composition, more preferably from 0.01 to 0.2% by weight, most preferably from 0.035% to 0.1% by weight.
• the stabiliser is preferably used in an amount from 0.001% to 0.2% by weight based on the total weight of the composition.
• the stabilisers assist by assuring good odour stability upon storage particularly when the composition is prepared using a surfactant having substantial unsaturated character (i.e. type (a) surfactants as herein defined).
• such additional stabilisers include mixtures of ascorbic acid, ascorbic palmitate and propyl gallate (under the tradenames Tenox® PG and Tenox® S-1); mixtures of butylated hydroxytoluene, butylated hydroxyanisole, propyl gallate and citric acid (under the tradename Tenox® 6); tertiary butylhydroquinone (under the tradename Tenox® TBHQ); natural tocopherols (under the tradenames Tenox® GT-1 and GT-2); long chain esters of gallic acid (under the tradenames Irganox® 1010, Irganox® 1035, Irganox® B 117 and Irganox® 1425) and mixtures thereof.
• Tenox® PG and Tenox® S-1 mixtures of butylated hydroxytoluene, butylated hydroxyanisole, propyl gallate and citric acid
• Tenox® 6 tertiary butylhydroquinone
• Tenox products are supplied by Eastman Chemical Products Inc.
• Irganox products are supplied by Eastman Chemical Products Inc.
• the above stabilisers can also be mixed with chelating agents such as citric acid; 1-hydroxyethylidene-1,1-diphosphonic acid (Dequest® 2010, ex Monsanto); 4,5-dihydroxy-m-benzene-sulphonic acid/sodium salt (under the tradename Tiron®, ex Kodak) and diethylenetriaminepentaacetic acid (under the tradename DTPA, ex Aldrich).
• chelating agents such as citric acid; 1-hydroxyethylidene-1,1-diphosphonic acid (Dequest® 2010, ex Monsanto); 4,5-dihydroxy-m-benzene-sulphonic acid/sodium salt (under the tradename Tiron®, ex Kodak) and diethylenetriaminepentaacetic acid (under the tradename DTPA, ex Aldrich).
• Co-active softening surfactants for the cationic surfactant may also be incorporated in an amount from 0.01 to 20% by weight, more preferably 0.05 to 10%, based on the total weight of the composition.
• Preferred co-active softening surfactants are fatty acids, fatty amines and fatty N-oxides.
• compositions of the invention may also comprise one or more perfumes.
• the perfume is used in a concentration of preferably from 0.01-15% by weight, more preferably from 0.05-10% by weight, most preferably from 0.1-5% by weight, e.g. 0.15 to 4.5% by weight based on the total weight of the composition.
• compositions may also contain one or more optional ingredients conventionally included in fabric conditioning compositions such as pH buffering agents, perfume carriers, colourants, hydrotropes, antifoaming agents, antiredeposition agents, polyelectrolytes, enzymes, optical brightening agents, anti-shrinking agents, anti-wrinkle agents, anti-spotting agents, germicides, fungicides, anti-corrosion agents, drape imparting agents, anti-static agents, ironing aids and dyes.
• optional ingredients conventionally included in fabric conditioning compositions such as pH buffering agents, perfume carriers, colourants, hydrotropes, antifoaming agents, antiredeposition agents, polyelectrolytes, enzymes, optical brightening agents, anti-shrinking agents, anti-wrinkle agents, anti-spotting agents, germicides, fungicides, anti-corrosion agents, drape imparting agents, anti-static agents, ironing aids and dyes.
• the product In its undiluted state at ambient temperature the product is in a clear or translucent liquid.
• the composition may be an aqueous solution, a solvent based isotropic liquid or a microemulsion. Microemulsions are preferred.
• micro-emulsions which are stable at between about 10° C. and about 50° C.
• compositions are generally provided in a highly concentrated form but have a viscosity that is acceptable to the consumer, i.e. pourable.
• the term “pourable” means that the compositions have a viscosity of 1 Pa.S (1000 cps) or less, preferably 0.7 Pa.S (700 cps) or less, more preferably 0.5 Pa.S (500 cps) or less, most preferably 0.25 Pa.S (250 cps) or less, e.g. 0.15 Pa.S (150 cps) or less at a shear rate of 106 s ⁇ 1 at 25° C., measured using a Haake rotoviscometer.
• compositions are stable, by which it is meant that immediately upon formation of the composition, there are no visible clumped particles present.
• the composition is preferably used in the rinse cycle of a home textile laundering operation, where, it may be added directly in an undiluted state to the washing machine, e.g. through a dispenser drawer. Alternatively, it can be diluted prior to use.
• the compositions may also be used in a domestic hand-washing laundry operation.
• the solution When the composition is dispersed in water, the solution preferably has a pH of from 1.5 to 5.
• Product 1 is a clear viscous products with a yellowish tinge.
• Product 2 is a clear viscous product that is nearly colourless, and exhibits a bright violet fluorescent effect when held up to an ultra-violet light source.
• Products 3 and 4 are white opaque viscous products, that are too thick to pour.
• Product 6 has the same appearance as product 3, but contains visible yellow flocs of the fluorescer.
• Tetranyl AOT-1 di-oleyl ester of triethanol ammonium methyl sulphate, having IV of about 85. Material contains approx. 20% DPG solvent. (ex Kao).
• Tetranyl AHT-V di-hydrogenated tallow ester of triethanol ammonium methyl sulphate, having IV of about 0. Material contains approx. 15% IPA solvent. (ex Kao)
• Estol 1545 octyl stearate (ex Uniqema)
• Coco 3EO C 12 alkyl ethoxylated with 3 moles ethylene oxide
• Coco 20EO C 12 alkyl ethoxylated with 20 moles ethylene oxide
• Blankophor DCB fluorescent whitener (ex Bayer)

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• 2004
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